Repairing or replacing a block foundation wall
If your old foundation wall has a few fine cracks that aren't growing and it still stands straight, foundation repair is usually the better use of your money, and I'll tell you if it can wait. When the wall leans, the block is crumbling at the face, or you're asking it to carry more than it was built for, patching only buys time. That's when a new wall is the honest call.
What sets the cost of a foundation block wall
Size comes first, since a longer, taller wall takes more block, steel, grout and labor. After that it's what we find when we dig, because firm ground close to the surface means less excavation and hauling than soft ground that has to come out. A full waterproofing system costs more than a dampproof coating, and tight access, engineered plans and the permit all add to the total.